1857 $20 AU55 NGC. CAC. Unlike its San Francisco
counterpart, the 1857 P-mint double eagle was not heavily
represented in recent shipwreck finds, and Choice AU specimens,
like the present coin, are scarce. Only a trace of actual wear
shows on the high point of the well-detailed design elements, and
the light greenish-gold fields are lustrous and lightly
abraded.(Registry
values: N1793) (NGC ID# 2693, PCGS# 8920)